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Rottnestia borussica ssp. granulata
Rottnestia borussica ssp. granulata Heilmann-Clausen in Heilmann-Clausen and Costa, 1989
Holotype: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, pl.17, fig.9
Locus typicus: Wursterheide research Well, Germany
Stratum typicum: Early Eocene (Ypresian)
De Coninck, ?1976: Psaligonyaulax simplicia, pl. 12, fig. 6
Original diagnosis: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 471
This subspecies of Rottnestia borussica is distinguished from ssp. borussica by a granulation of the endophragm. The processes of the periphragm are more fragile than those in ssp. borussica, and the periphragm is not so markedly curved (concave) between the processes. Dimensions of holotype: Pericyst length: 89 µm, Pericyst width: 68 µm, Endocyst length: 54 µm, Endocyst width: 50 µm.
Affinities: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 471
This new subspecies resembles Hystrichosphaeropsis complanata. In particular specimens like the one in pl. 17, fig. 5 have approximately the same outline as H. complanata in dorso-ventral view. The presence of processes in the new subspecies clearly distinguishes the two taxa.
Holotype: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, pl.17, fig.9
Locus typicus: Wursterheide research Well, Germany
Stratum typicum: Early Eocene (Ypresian)
De Coninck, ?1976: Psaligonyaulax simplicia, pl. 12, fig. 6
Original diagnosis: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 471
This subspecies of Rottnestia borussica is distinguished from ssp. borussica by a granulation of the endophragm. The processes of the periphragm are more fragile than those in ssp. borussica, and the periphragm is not so markedly curved (concave) between the processes. Dimensions of holotype: Pericyst length: 89 µm, Pericyst width: 68 µm, Endocyst length: 54 µm, Endocyst width: 50 µm.
Affinities: Heilmann-Clausen in Heilmann-Clausen and Costa, 1989, p. 471
This new subspecies resembles Hystrichosphaeropsis complanata. In particular specimens like the one in pl. 17, fig. 5 have approximately the same outline as H. complanata in dorso-ventral view. The presence of processes in the new subspecies clearly distinguishes the two taxa.